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Hybrid test tone for space-averaged room audio calibration using a moving microphone

  • US 9,736,584 B2
  • Filed: 07/21/2015
  • Issued: 08/15/2017
  • Est. Priority Date: 06/28/2012
  • Status: Active Grant
First Claim
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1. A playback device comprising:

  • one or more speakers;

    a network interface;

    one or more processors;

    a data storage having stored therein instructions executable by the one or more processors to cause the playback device to perform operations comprising;

    receiving, from a control device via the network interface, a command that instructs the playback device to emit a calibration sound; and

    in response to the received command, causing the one or more speakers to emit a periodic calibration sound that covers a calibration frequency range, wherein the periodic calibration sound comprises (i) a first component that includes noise at frequencies between a minimum of the calibration frequency range and a first threshold frequency, and (ii) a second component that sweeps through frequencies between a second threshold frequency and a maximum of the calibration frequency range.

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